Machine for rolling hollow ware



(No Model.) I 4 Sheets-Sheet 1.

- J; T. DUFF.

MACHINE FOR ROLLING HOLLOW WARE.

- N0. 358; 438. V v Patented Mar. 1, 1887.

WIWLESSES; v I IflvEfiToP w z g g fivwmm. 0/ Q (No Model.) 4 Sheets-Sheetgyl J..T. DUFF. I MACHINE FOR ROLLING HOLLOW WARE. No; 358,438. Patented Mar. 1,1887

(No Model.) 4 SheetsSheet 3.

J T. DUFF.

MAGHIN E FOB ROLLING HOLLOW WARE.

No. 358,438. I Patented Mar. 1, l88'7'.

Whgfssmsi I LVENTO M m (No Model.)

J.T.D FP. MAOHI NE FOR ROLLING HOLLOW WARE. No. 358,438.

Patented Mar. 1, 1887.

WTNESSES: wz hfiaf UNITED STATES PATENT OFFICE.-

JOHN T. DUFF, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO A. M. DUFF, A. M. NEGLEY, AND H. G. HUGUS, ALL OF SAME PLACE.

MACHINE FOR ROLLING HOLLOW WARE SPECIFICATION forming part of Letters Patent No. 358.438, dated March 1, 1887. Application filed November 11, 1886. Serial No. 218,641. (No model.)

To all whom it may concern.-

Be it known that I, JOHN T. DUFF, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Machine for Rolling Metallic Hollow WVare; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification.

My invention relates to a machine for rolling hollow Ware, the object being to provide an apparatus whereby circular plates of steel or other metallic substance may be readily formed into pots, skillets, frying-pans, 85c. and with this end in view my invention consists in a novel arrangement of apparatus, hereinafter more particularly specified, where by vessels or utensils of the character named may be manufactured with facility and in an economical manner.

In the annexed drawings, Figure lis a plan view of. a machine for rolling hollow ware,

constructed in accordance with my invention.

Fig. 2 is a front elevation of the same. Fig. 31s an end elevation of the apparatus, showinga plate in position. Fig. 4 is a perspective view of a portion of the gage by means of which the circular plates are centered and made to occupy the proper position between the rolls. Fig. 5 is a sectional view of the stationary or fixed roll, showing the manner of securing the same to a horizontal driving.- shaft. 7

To putfmy invention into practice, I provide a suitable standard, 1, and secure the same by bolts 2 to a base-plate, 3. Across the top of this standard 1, I arrange in proper bearings, 4, a stout shaft, 5, to one end of which I secure a small toothed wheel or pinion, 6, for operating the same. To the other end of this shaft 5, I firmly attach, by means of a screw-thread, a large roll, 7, the exterior surface of which corresponds in size and form to the article-or product of the machine. At the rear, and a short distance to the left of the roll 7, I erect another standard, 8, having a dovetail slide or guide, 10, in-the form of an are or segment of a circle attached thereto and extending from one standard to the other, and equal to about one-quarter of a circle. On this segment I mount a carriage, 11, having a dovetail projection or extension,-12, capable of traveling within the circular slide 10 toward and away from the fixed or forming roll 7. On

the under side of this extension 12 of the carriage 11, I form a toothed rack, 13, which, in

conjunction with aworm-screw, 14, secured to a shaft, 15, placed in proper bearings, 16, and rotated by a pulley, 17, revolves the carriage 11 with a slow and powerful motion toward the fixed roll 7. On the top of this carriage 11,

and at right angles to the axis of the fixed roll 6 5 21, and at right angles to the fixed roll 7, I

mount in suitable bearings, 24, a short shaft, 25, having secured to its forward end a roll,

26, similar in size and form of construction to that before described.

By the. organization above described the bearings 24 of the bending-roll 26 are made to move in parallel arcs in the same direction toward and from the forming-roll, thus causing the bending-roll to describe a true are when applying the bending-pressure.

To the left of the fixedroll 7, and in a direct line with the axis of the same, I secure a vertical standard, 27, having attached across the top a suitable frame, 28, on which I mount a sliding carriage or table, 29, capable of moving toward and away from the small end of the fixed roll 7. This carriage 29, I provide on its under side with a rack, 30, which meshes gage with corresponding notches on the frame,

and thereby provide a means whereby the carriage 29 may be readily moved back and forth and secured in any desired position. On the top of this carriage 29, I secure in suitable bearings, 35, a horizontal shaft, 36, having an enlargement, 37, formed on the forward end, which serves as a means of securing the metallic plates or blanks 38 between the rolls 7 and 26. To the reverse end of this shaft 36, I loosely secure a threaded rod, 39, mounted in a threaded bearing, 40, and having ahand r 1 wheel, 41, attached to the same. By this coustruction the-enlarged end 37 of the shaft- 36 may be adjusted toward the fixed roll 7 to any degree of accuracy, to provide for any slack or want of accuracy in the clutch 3 This form of clamp gives a quick movement for the greater part of its travel, and the screw 39 gives it a fine and accurate adjustment.

Below the rolls 7 and 26, I arrange an adjustable sliding-gage, consisting of two ver- 2o tical posts, 42, secured together by a transverse slotted bar, 43, and mounted on suitable slides placed at right angles to each other. Each of the posts 42, I provide with a sliding base, 44, which allows the same to move toward and away from each other by means of dovetail slides formed on the under side of the base block 44, and secured in tables 45, capable of moving in an opposite direction. Adj ustably attached to these posts 42 are two guides, 46, 0 which may be moved to any desired position on the posts 42 by releasing a set-screw, 47. These adjustable pieces 46 serve to center and support the circular plates or blanks 38, between the rolls 7 and 26, prior to clamping or securing the same.

At the middle of the transverse bar 43, which attaches the vertical posts 42 together, I form a downwardly-projecting piece, 48, to which I connect a rod, 49, which, together with a c.lever, 50, affords a means for withdrawing the gage from beneath the circular plates 38 after the same has been properly secured between the fixed roll 7 and clamping device. A spiral spring, 51, secured about the rod 49 recovers or brings the gage back to its original position after the lever has been released by the operator.

The operation is as follows: A number of circular plates or blanks, 38, are cut to the re- 50 quired size, and the gage set in such a manner that when the plates 38 are placed and supported therein the same will be centered. These circular plates or blanks 38 are placed in a properly-constructed furnace and brought 5 to the required degree of heat, and a single piece 38 quickly placed between the rolls 7 and 26, the gage below supporting and centering the same. The hand-wheel 33 is now rapidly revolved, which, by means of the pinion and rack 30, moves the table 29 and clamping device forward until brought in contact with the plate 38, between the rolls 7 and 26. The hand-wheel 33 is now pushed inwardly, which action engages the clutch 34 6 with notches on the frame and locks the carriage 29. The clamping device 37, by

means of the threaded shaft 39 and hand-wheel 41, is previously adjusted to correspond to the notches in the clutch 34. The gage is now withdrawn from beneath the plate 38 by means of the lever 50, and held in that position by the operator until the plate 38 is slightly bent or warped over the fixed roll 7 by the action of the moving roll 26. The plate 38 being now secured between the fixed or forming roll 7 and clamp 37, the shaft 5 is rapidly rotated. A driving-beltopcrating the pulley 17 and shaft 15 rotates the worm 14, and thereby moves the carriage 11 and roll 26 toward the fixed roll 7, bending the metallic plate 38 over the same, thereby forming a deep hollow vessel correspondingin size and form with the two rolls 7 and 26. The hand-wheel 33 is now released from the clutch 34 and revolved in a reverse direction, which operation carries the carriage 29 and clamping device back a suitable distance and allows the vessel to be removed from the fixed roll 7, at which time the carriage 1]. is moved back and another plate placed in position, and the same operation repeated.

It will be readily understood that by revolving the roll 7 at a high speed and moving the carriage 11 slowly toward the fixed roll 7 sutficient time will be given to gather and stretch the plate 38 over the fixed roll or form 7.

By substituting rolls of greater or less diameter than those shown on the drawings any required size of hollow ware may be obtained by this machine, and of any depth. The gage below the rolls can also be adapted or adjusted to properly center and sustain a plate of any diameter by moving the vertical posts toward or away from each other, and elevating or lowering the sliding pieces by means of the set-screws.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a machine for rolling hollow ware, the combination of a supporting-frame, the forming-roll mounted in fixed bearings in said frame, means for rotating the forming-roll, the bending-roll mounted in bearings movingtogether in the arc of a circle toward and together from the forming-roll, and means for so moving and guiding them, whereby the blank is bent around the forming-roll by pressure applied in the arc of a circle, substantially as described.

2. In a machine for rolling hollow ware, the combination of a supporting-frame, a forming-roll mounted in fixed hearings in said frame, a bending-roll, the shaft on the end of which it is mounted, the carriage in which the shaft has its bearings, means for adjusting the roll in its carriage toward and from the forming-roll and transversely thereto, means for rotating the forming-roll, and means for moving and guiding the carriage in the arc of a circle toward the forming-roll, whereby the blank is bent by pressure applied in the arc of a circle, substantially as described.

3. In a machine for forming hollow ware, the combination of the supporting frame, the

forming-roll mounted in fixed bearings in said frame, means for rotating the forming-roll, means for securing the blank to the end of the forming-roll, the bending-roll, its bearings, and means for moving and guiding the bending-roll in its bearings in the arc of a circle toward and from the forming-roll and beyond its inner end, substantially as described.

4. In a machine for forming hollow ware,the combination, with the formingroll, of the clamping device herein described, consisting of the combination of the sliding carriage, means for rapidly sliding it back and forth, a clutch for looking it in the desired position, a rotary shaft having an enlarged head or clamping-disk, 37, and an adjusting-screw, 39, substantially as described.

JOHN T. DUFF.

Witnesses:

M. E. HARRISON, D. O. NEGLEY. 

